---Who is the tallest boy? ---It ______ be John. John is of medium height.
| A．must | B．needn’t | C．might | D．can’t |
My grandma is learning to use computers. She says, “One is never old to learn’’
A. so B. too C. very
– Does Aunt Tara ?
– Yes. She has three dogs, two rabbits, and some fish in her house.
A. keep pets
B. visit the zoo
C. work on the farm
– How to be a greener person?
– Keep our environment clean. Don’t _______ any litter.
A. throw away B. pick up C. put on
There goes the bus. Be quick, you will miss it.
A. and B. so C. Or
– We’ll have a mountain climbing, but when shall we meet?
– Let’s make it at half past eight _______ the morning of May 1st.
A. on B. in C. to