________my dear teacher couldn’t understand was ________ fewer and fewer middle school students showed interest in her lessons.
| A．What; why | B．That; what | C．What; because | D．Why; that |
The thieves ran away when the burglar alarm(防盗警报器).
| A．broke away | B．came back | C．went badly | D．went off |
The secretary worked late into the night, _____ a long speech for the president.
| A．to prepare | B．preparing | C．prepared | D．was preparing |
The train was ______ to arrive at 11:30,but it was an hour late.
| A．about | B．likely | C．certain | D．supposed |
I have been keeping the portrait _____ I can see it every day, as it always reminds me of my childhood in Paris.
| A．since | B．where | C．as | D．if |
Because he ________ the secret, his friend became very angry.
| A．put out | B．let out | C．gave out | D．left out |