Cryptozoologists say that some animals which scientists claim __________ might still __________.

A. are extinct; be exist;                                     B. to extinct; be exist

C. are extinct; exist                                            D. to extinct; exist

 __________ in 1722 by Captain Jacob Roggenveen, the Moai have stood on Easter Island for centuries __________ the island’s people from intruders.

A. Found; guarding                                            B. Found; guard

C. Finding; guarding                                          D. Finding; guard

 She looks sad. Could you please tell me __________ that prevents her from being as happy as before?

A. what it is                        B. it is what                C. why it is                D. it is why

 ---- Tom is never late for school. Why is he absent today?

---- Something ___ to him.

A. must happen                                                   B. must have happened

C. couldn’t have happened                                    D. should have happened

 I couldn’t stand __________ all those busy streets! Sometimes I felt like __________ at the drivers of all those cars!

A. crossing; to shout                                         B. to cross; to shout

C. crossing; shouting                                         D. to cross; shouting

 We wish we ______________ what you did when we were at high school.

A. did                            B. could have done       C. have done                D. should do

 ---- The light in the office is still on.

---- Oh，I forgot_____________.

A. turning it off　            B. turn it off　             C. to turn it off　 D. having turned it off

 That book ________________ into at least 20 foreign languages.

A. has said to be translated                             B. has been said to have translated

C. is said that it had been translated                 D. is said to have been translated

 Experts believe that the pyramid must have been built by ____________skilled workers.

A. tens of thousand                                    B. ten thousands

C. tens of thousands of                              D. ten thousands of

 Lock Ness is a famous lake because it is __________ the home of a huge and mysterious beast __________ as the Lock Ness Monster.

A. basically; known                                    B. supposedly; known

C. basically; which known                           D. supposedly; which known