―Look! What a mistake! Why?
―Sorry, I _________ on it.
A．don’t concentrateB．hadn’t concentrated
C．haven’t been concentratingD．wasn’t concentrating
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：單選題


6.The soldier was ____ of running away when the enemy attacked.
A．scoldedB．chargedC．a(chǎn)ccusedD．Punished

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

As a senior student, I am determined to work harder in order to___the desired university.
A．a(chǎn)dmit byB．be admitted byC．a(chǎn)dmit intoD．be admitted into

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and
experts can’t be exactly sure about its use.
A．had been foundB．was foundC．has been foundD．would be found

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

 
8．—Isn’t it a surprise that I happened to meet Emily at Doris’ birthday party last weekend?
—If my memory serves me correctly, you__________each other for exactly three years.
A．hadn’t seenB．haven’t seenC．didn’t seeD．don’t see

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題

In the last six to nine months，teens in the US        to text messaging in numbers twice that in Europe and Asia．
A．tookB．have takenC．had taken D．would take

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


30. ---Which hotel are you in?
---I ___ in a hotel. A friend I met on the train from the south___ to put me up for a couple of nights.
A．haven’t stayed; has offeredB．a(chǎn)m not staying; offered
C．a(chǎn)m not staying; is offeringD．do not stay; offers

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


25．—Can you tell me the timetable of the school bus?
—Well，the bus________here for the first trip at 6：30am．　　　　
A．will leaveB．leftC．is leavingD．Leaves

查看答案和解析>>

科目：高中英語 來源：不詳 題型：單選題


26. Since the beginning of the vacation, I    across the country, and my next stop is the Wuyi Mountains.
A．had traveledB．will travelC．have been traveling D．was traveling

查看答案和解析>>

同步練習(xí)冊答案