Weather experts advise us out if PM2.5 levels are above 500.
| A．not go | B．not going |
| C．don’t go | D．not to go |
I strongly recommend that the information______ in my report____to our headmaster without delay.
| A．to be referred to; to be e-mailed | B．referring to; e-mail |
| C．referred to; be e-mailed | D．being referred to; being e-mailed |
It was too dark, and I couldn’t _______ the words written on the blackboard.
| A．look at | B．turn up | C．decide on | D．make out |
The fact of Madam Curuie’s_______ to the radiation for a long time ______ her poor health.
| A．being exposed;contributed to | B．exposed ;led to |
| C．having exposed;resulted in | D．exposing; resulted in |
I wonder __________ that made him so upset yesterday.
| A．it was what | B．what is it | C．what it was | D．it what is |
A terrible earthquake broke out in Yushu, Xinjiang several days ago,_______ we stopped any entertainment on April 21, 2010
| A．in that case | B．in which case | C．in case | D．in no case |