Scientists generally agree that earth’s climate will warm up over the next 50 to100 years______ it has warmed in the 20,000 years since Ice Age.
A. so long as. B. as much as C as long as. D as well as
It is required that students______ mobile phones at school, so seldom_______ them using one.
| A．don’t use; will you see | B．should not use; you will see |
| C．not use; will you see | D．can’t use; will you see |
------Tom is never late for work. Why is he absent today?
------ Something _______ to him.
| A．must have happened | B．can have happened |
| C．must happen | D．can happen |
Roads in this mountain area used to be_______; people found it hard to travel here.
| A．in poor conditions | B．in the poor condition |
| C．in poor condition | D．in a poor condition |
--- someone says something negative about me?
------Just ignore it.
| A．As is | B．what if | C．Even if | D．Only if |
Every time ______ I go to school, I am usually riding my bike, _____ I take a bus.
| A．when; besides | B．/; except when | C．when; except for | D．/; except for |