Volunteering our time to help people_______ a good way to learn new things.（ ）
| A． |
am |
B． |
is |
C． |
are |
﹣ Jack， let′s have a picnic after school．
﹣Sorry． I have_____Frank to work on the biology report with him．（ ）
| A． |
advised |
B． |
expected |
C． |
suggested |
D． |
promised |
﹣May I help you with some jeans， sir？
﹣ Yes， I′d like to try on those blue_____．（ ）
| A． |
one |
B． |
pair |
C． |
two |
D． |
ones |
We usually go swimming in_____summer． But in____summer of 2018， we didn't．（ ）
| A． |
/；/ |
B． |
a； a |
C． |
/；the |
D． |
a；/ |
Wasn't Bob supposed to be here？
_______． He will be here in five minutes．（ ）
| A． |
No wonder |
B． |
All right |
| C． |
Don't worry |
D． |
Enjoy yourself |
It was the middle of the night _____the sound of the piano woke me up．（ ）
| A． |
because |
B． |
if |
C． |
when |
D． |
although |