A. work of a day
B. a day's work
C. day's work
D. a-day work
[名词解释] 乒乓反应(ping-pong reaction)
[单选题]I'm tired out. I all afternoon and I don't seem to have finished anything.A. shoppedB. have shoppedC. had shoppedD. have been shopping
[主观题]Maria wants _________(play)ping-pong.
[单选题]8.—Can we _______ ping-pong?—No,_______ tennis.A. play; let's playB. plays; let's playC. play; let's to playD. plays; let's to play
The lights are out.A. EvidentlyB. EvidentC. EvidencedD. Evidence
[主观题]I have a ping-pong ball and two bats.L _______play ping-pong.
[单选题]The math problem is ______ to work out.A.too difficultB.difficult muchC.eno
Youyour sweater inside out.A. had wornB. woreC. were wearingD. are wearing
[单选题]That was a difficult question, but Mary still _______ towork it out.A.did B
[单选题]That was a difficult question, but Mary still ______ to work it out.A.didB.