If you are going to be a computer programmer， you'd better start with the ABCof computers．（ ）
A．English grammarB．English letters
| A． |
the difficulties |
B． |
the basic knowledge |
My parents have a lot of housework ．（ ）
| A． |
do |
B． |
to do |
C． |
doing |
You'd better your coat，it's very cold outside．（ ）
| A． |
wear |
B． |
put on |
C． |
dress |
Where's my ruler？I can't it anywhere．（ ）
| A． |
look for |
B． |
find out |
C． |
find |
Could I ask you some questions？
Yes，you ．（ ）
| A． |
can |
B． |
could |
C． |
must |
she is only seven，she can cook dinner．（ ）
| A． |
But |
B． |
So |
C． |
Though |