________ was known to them that the boss had broken his promise ________ he would give them a rise.
| A．What; what | B．It; which |
| C．It; that | D．As; that |
Use the umbrella to ______ yoursel
f from the rain.
| A．prevent | B．keep | C．save | D．protect |
____ for a long time, but he managed to catch up with his classmates at last.
| A．Having been ill | B．Being ill | C．He was ill | D．Though ill |
We mustn’t waste anything; ______, we mustn’t waste our time.
| A．after all | B．in all | C．above all | D．at all |
— Look, it _____ be Jack who is at the gate of the library.
It _____ be him. He has gone abroad.
may; must B. must; mayn’t C. must; can’t D. can; mayn’t
She knows a lot about the film. She must have seen it before, ______ ?
must she B. mustn’t she C. has she D. hasn’t she