【題目】I have an appointment _______ Dr．Brown，but I need to change it．

【題目】I have no formal clothes for the occasion. Perhaps I can ______ in a dark suit?

【題目】The reason _____ he missed this class was different from the one _____ you explained to me.

【題目】Just be patient．You _____ expect the world to change so soon．

【題目】People who can’t ________ between colors are said to be colorblind.

【題目】Peter _____ eat a lot of meat, but now he _____ a vegetarian diet.

【題目】A society grows great when old men plant trees _____ they know they’ll never sit in.

【題目】China has a rapid rising middle class and a culture _____ it is polite to over-order food for guests in restaurants.

【題目】 These old pictures remind me of the college days_____ they spent together.

【題目】I was wondering _____ that he won his regulars back so soon.