People taking the therapy learn what scientists _____ for years-laughter is the

题型：山东省模拟题难度：来源：

People taking the therapy learn what scientists _____ for years-laughter is the best medicine. [ ]
A. know
B. knew
C. have known
D. had known

答案

举一反三

It"s 7:30. I can"t believe you___ cooking dinner yet, Sally.[     ]
A. haven"t started
B. didn"t
C. don"t start
D. hadn"t started

题型：广东省月考题难度：| 查看答案

Only after _____ your homework _________ watch TV.[     ]
A. have you finished; you can
B. you have finished; can you
C. have you finished; can you
D. you have finished; you can

题型：甘肃省同步题难度：| 查看答案

Great changes ________in my hometown and some new buildings ________.[ ]
A．have taken place；have appeared
B．have been taken place；have appeared
C．have taken place；have been appeared
D．were taken place；were appeared

题型：同步题难度：| 查看答案

Recently some Chinese experts________that another law on wildlife protection________as
soon as possible.[ ]
A．suggested；must be passed
B．have suggested；be passed
C．have suggested；pass
D．suggested；would be passed

题型：同步题难度：| 查看答案

Tom is so lazy that it is the third time that he _____ late this week. [ ]

A. is coming
B. comes
C. came
D. has come

题型：吉林省期中题难度：| 查看答案