A well-written composition__________ a good choice of words and clear organization among other things.
| A．calls on | B．calls for | C．calls up | D．calls off |
I was about to leave my house________the phone rang.
| A．while | B．when | C．as | D．after |
.________they were singing, the teacher came in.
| A．Before | B．after | C．As | D．Until |
All that can be eaten _______ eaten up.
| A．are being | B．has been | C．had been | D．have been |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
You're the only person ______I've ever met ______could do it.
| A．who;/ | B．/; whom | C．whom;/ | D．/; who |