The first prize goes to _______ makes the greatest contribution to the company.
| A．whomever | B．whichever | C．no matter who | D．whoever |
Some researchers believe that there is no doubt _____ a cure for AIDS will be found.
| A．which | B．that | C．what | D．whether |
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