People love the convenience of bottled water, but if they ________ the problem it causes, they ________ try carrying water in a reusable steel container instead of plastic.
| A．realized; will | B．had realized; will |
| C．realized; would | D．have realized; would |
---- I’m sorry I can’t go to the concert with you tonight, because I have a bad cold.
---- If you don’t go, __________.
| A．nor do I | B．nor will I | C．so do I | D．so will I |
_________ from what he did, he isn’t a person to depend on.
| A．Judge | B．Judging | C．Judged | D．To judge |
The _____ look on his face showed that he had enough confidence in himself.
| A．surprised | B．puzzled |
| C．excited | D．determined |
She didn’t ______ work when she had the baby.
| A．give in | B．give out | C．give away | D．give up |
______ the students in our class is 50 and _______ them study very hard.
| A．The number of; the number of | B．A number of ; the number of |
| C．The number of; a number of | D．A number of; a umber of |