Before you ask someone for help， find out he is the right person for your problem．（ ）
A．sinceB．thatC．whetherD．unless
The policeman warned the man after drinking．（ ）
| A． |
not to drive |
| B． |
to drive |
| C． |
driving |
has the 2018World Cup been on？
For about two weeks．（ ）
| A． |
How soon |
B． |
How far |
C． |
How long |
Li Lei's mother him because he went out to play in the rain．（ ）
| A． |
was angry with |
| B． |
was pleased with |
| C． |
was proud of |
the girl is only six years old， she knows more than 300ancient Chinese poems．（ ）
| A． |
If |
B． |
Unless |
C． |
Although |
May I use your computer？
Sorry． I on it．（ ）
| A． |
work |
| B． |
am working |
| C． |
have worked |