— _______ does Earth Day come every year?
—It comes on April 22.
| A．What | B．Why | C．When | D．Where |
I have no brothers sisters.
A. or B. but C. and
My father is a .
A. work B. worker C. works
We in Canada.
A. live B. living C. lives
The math problem is so hard． I really don’t know________.
| A．how to do it | B．how to do |
| C．what to do it | D．where to do it |
We played badminton ______ Sunday afternoon.
| A．on | B．in | C．at | D．For |