Last summer I took a course on___________poisonous gases.
| A．how to deal with | B．what to deal with | C．how to be dealt with | D．what to be dealt with |
Although all of the apples _____, none of them _____ good.
| A．have tasted; are tasted | B．have been tasted; are tasted |
| C．have tasted; taste | D．have been tasted; taste |
Jenny hopes that Mr. Smith can suggest a good way to have her written English _____ in a short period.
| A．improve | B．improving | C．to improve | D．improved |
It is generally accepted that _____ boy must learn to stand up and fight like _____ man.
| A．a; a | B．a; the | C．the; the | D．a; 不填 |
I think nobody makes _______ contributions to the company than him.
| A．greater | B．more great | C．more greater | D．much great |
I have been living in the United States for twenty years, but seldom_______ so lonely as now.
| A．have I felt | B．I had felt | C．I have felt | D．had I felt |