It’s the first time ______ he has helped us.
A. that B. before C. when D. who
Here are two pairs of shoes, ______ you may choose.
A. both of them B. either of them C. any of which D. either of which
He plays well or badly according to his mood (����), so he's a very _________ player.
A. modest B. easygoing C. temperamental D. calm
No one knows exactly ______ this important discovery was made.
A. that B. that how C. what D. when
The weather turned out to be very good, _______ was more than we could expect.
A. what B. which C. that D. it
I don't really work here；I _______ until the new secretary arrives.
A. just help out B. have just helped out C. am just helping out D. will just help out
