You must read the carefully before taking the medicine．（ ）
| A． |
news |
B． |
pictures |
| C． |
numbers |
D． |
instructions |
We will visit the history Museum if it _______ tomorrow．（ ）
A．won't rainB．doesn't rain
C．wasn't raining
The telephone ______ by Alexander Graham Bell in 1876．（ ）
A．was inventedB．is invented
C．invented
Marcus is our foreign teacher．He _______ in our school for two years．（ ）
A．wasB．will beC．has been
Look!The man _____ be Mr．Black．He's always standing there at this time every day．（ ）
A．mustB．can'tC．mustn't
Going hiking with a group of people makes me _________．（ ）
A．relaxingB．to relaxC．relax