Everyone in our class was working hard and doing what we could _______ a good university．
| A．enter | B．to enter | C．entering | D．entered |
My grandfather is fond of talking about the good old days, ________ is often the case with old people.
| A．when | B．as | C．that | D．what |
It’s the third time that John has been late, ____?
| A．hasn’t he | B．isn’t he | C．isn’t it | D．hasn’t it |
________ surprises us most is that she doesn’t even know ________ the difference between the two lies.
| A．What; where | B．All; which | C．What; that | D．That; where |
----Why did you cancel your trip to the New York?
----We were just about to leave ________ it started to snow.
| A．when | B．before | C．after | D．since |
She’s in a hopeless situation, ________ we will keep a very close eye on.
| A．where | B．when | C．which | D．that |