His experiment done in ______ summer of 1970 was ______ failure.
| A．/; a | B．/; / | C．the; a | D．the; / |
_____ she heard the news that she won a scholarship, she was very excited.
| A．The moment | B．At the moment | C．For the moment | D．A moment |
American President Obama, together with some members of his government, _____ going to visit China next month.
| A．is | B．are | C．were | D．was |
____ in the iron cage of the zoo, the tiger got quite angry.
| A．To trap | B．Trapping | C．To be trapped | D．Trapped |
No sooner _____ back to the kitchen than the doorbell rang.
| A．got I | B．I had got | C．had I got | D．I did get |
. It is no use fishing for golden fish in this river; there are _____ left.
| A．some | B．none | C．a few | D．many |