Many scientists have believed that there may be a _________of life on the Mar．
| A．mark | B．signal | C．sigh | D．sign |
Though he is busy, he is very _____ and makes a telephone call to his parents from time to time and tries his best to spare some time to visit them.
| A．constant | B．considerate | C．considerable | D．conscious. |
---What did your mother say on the phone just now?
--- She asked me _____ I was getting on well with my new classmates.
| A．that | B．if | C．how | D．what |
According to recent reports, one of the rare animals,_____ giant panda, is in_____ danger of dying out.
| A．the;/ | B．the; a | C．a; a | D．/; the |
— You haven’t been to Beijing， have you？
—______. And how I wish to go there again!
| A．Yes， I have | B．Yes， I haven’t |
| C．No， I have | D．No， I haven’t |
-- What bad luck that we______ the football match in the last 3 minutes.
--And we_______ hard in the last 3 years!
| A．had lost; trained | B．were losing; had trained |
| C．have lost; have trained | D．lost; have been training |