Betty is often seen the lonely old man with his housework．（ ）
| A． |
to help |
B． |
helping |
C． |
helps |
D． |
helped |
Our Chinese teacher didn't go to bed______ he finished his work last night．（ ）
| A． |
if |
B． |
until |
C． |
since |
D． |
because |
Mom，where is my model plane？
Oh，it____ to Jenny yesterday．（ ）
| A． |
is lent |
B． |
lends |
C． |
was lent |
D． |
lent |
The environment here becomes better and better．______ birds are coming back．（ ）
| A． |
Thousands of |
B． |
Thousand of |
| C． |
Thousands |
D． |
Thousand |
He______ speak English very well although he has studied it for only one year．（ ）
| A． |
mustn't |
B． |
can't |
C． |
must |
D． |
can |
Maybe you can catch the last bus．
_____．If not，I'll have to walk home．（ ）
| A． |
Good job |
B． |
Just so﹣so |
C． |
Not at all |
D． |
I hope so |