Try not to cough more than you can________since it may cause problems to your lungs.
| A．check | B．allow | C．stop | D．help |
The boy wanted to play games at home but his mother told him __________.
| A．not to | B．not to do | C．not do it | D．don’t do |
This disaster ______ that people had no knowledge of first aid and they hadn’t known how to protect them-selves in face of danger.
| A．led to | B．contributed to | C．resulted in | D．lay in |
The train had left, so we could do nothing but ________ another.
| A．wait | B．to wait | C．waited | D．waiting |
_________ computer games, his parents were very worried about his study.
| A．Addicted to | B．He addicted to | C．His addicting to | D．Addicting to |
. So seriously _____ in the accident that he was sent to hospital at once.
| A．he was wounded | B．was he hurt | C．he did injure | D．did he hurt |