Mr.Wait, would you please fill out this application form?

_______ you please _______ a minute ? A: Would…wait B: Do…wait C: Shall…wait D: May…wait

He didn’t know () or go home. A: if to wait B: to wait C: whether to wait D: either to wait

He didn't know or go home. A: to wait B: if that he should wait C: if to wait D: whether to wait

10. I am pretty busy today. There are so many customers to . A: wait on B: wait with C: wait for D: wait

I’ll be home late, so please don’t ____me. A: wait up for B: wait to C: wait at D: wait on

Ann said _____ if she was late. A: don't wait not for her B: wait not for her C: not to wait for her D: to wait not for her

Why does Mr Baker ask Mr Li to make the offer firm for sevendays? A: Because he has to ask his boss for instructions. B: Because he needs to wait for his boss’sarrival. C: Because he needs to get permission from his wife. D: Because he has to send telegrams to his customers.

He doesn't know （）or go home. A: to wait B: if to wait C: if that he should wait D: whether he should wait

如果Wait(S1)和Wait(S2)两个操作在一起，那么Wait操作的顺序至关重要，一个同步Wait操作与一个互斥Wait操作在一起时（ ）Wait操作在（ ）Wait操作前。而两个Signal操作的次序（ ）。