I began the day _____ tennis with a secondary-school friend I hadn't seen for a while.
A:playing
B:play
C:to play
D:played

The old saying _____ genius is one per cent inspiration and ninety-nine per cent perspiration is applicable for anyone who gets successful.A:whichB:ofC:thatD:what

A.
A:which
B:of
C:that
D:what

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“行为科学”学派的主要理论：需要层次理论、双因素理论、X，Y理论、Z理论。() 点击查看答案