---It is reported that a Boeing 777-200 plane became lost in communication （失去联系） at midnight __________ the early morning of March 8th．
---I was amazed to hear that．
| A．at | B．in | C．on | D．Of |
–What do you often do _____classes to relax yourselves?
---We often do eye exercises. Listen to music or do some running around the school.
A. in B. among C. between
Many people do not realize the importance of health___they have fallen ill.
A. until B．while C．when
–When _____for Australia, do’you know?
-I’m not sure. When he ______ . I’II let you know.
A. he leaves; leaves
B. will he leave; will leave
C. will he leave; leaves
When I walked past the park, I saw some old people______chinese Taiji.
A.do B.did C.doing
The children ______not to play with fire or go to the river without parents.
A. tell B. are told C. are asking