You never know how much difficulty we had _________________ the problem. Luckily, we try to solve it with Mrs Wu’s help.
| A．working out | B．work out |
| C．worked out | D．to work out |
Thanks to the video Visiting the World Online，we can enjoy the sights leaving home.（ ）
| A． |
with |
B． |
by |
C． |
without |
﹣So far，Hi Mom is one of the most films I've ever seen.
﹣Yes，I can't wait it a second time.（ ）
| A． |
move；seeing |
B． |
moved；see |
C． |
moving；to see |
The World Environment Day was June 5th，2021.（ ）
| A． |
fifty；on |
B． |
fiftieth；on |
C． |
fifties；in |
Instead of sitting around and wasting_____days，we should begin to change______.（ ）
| A． |
ours；ourselves |
B． |
our；us |
C． |
our；ourselves |
If you want to ask for sick leave，you must get your teacher's first.（ ）
| A． |
achievement |
B． |
instrument |
| C． |
agreement |
D． |