It was 1969 _____ the American astronauts succeeded in landing on the moon.
| A．that | B．when | C．on which | D．which |
My computer is out of _________ order all of a sudden. Could you do me________ favor and type the plan for me right now?
| A．the; a | B．the; 不填 | C．不填; a | D．不填; 不填 |
— Why are your hands that dirty?
— Oh, I______ in the garden since we finished breakfast.
| A．worked | B．was working |
| C．am working | D．have been working |
Yesterday I went to see him, _________ that he had gone abroad two days before.
| A．only to learn | B．to learn only |
| C．only learned | D．only learning |
Every year，a good many tourists are attracted to visit the old temple ________back to the eleventh century.
| A．dated | B．dating | C．to date | D．being dated |
________that we can’t get the necessary equipment，we will have to give up the experiment.
| A．To assume | B．Assumed | C．Assumes | D．Assuming |