This book ___ be yours. Look! Here is your name.
| A．would | B．should |
| C．must | D．may |
This year marks Earth Day's 50th birthday． It was created to remind people to ________ the earth﹣the home to all the living things．（ ）
| A． |
talk about |
B． |
care about |
C． |
hear about |
As students， we're supposed to go to the museum often． We can get more knowledge from the things ________． （ ）
| A． |
on show |
B． |
on sale |
C． |
on lane |
You can bravely tell others what you think if you have different ideas．But ________ remember to choose the proper way．（ ）
| A． |
never |
B． |
seldom |
C． |
always |
Swimming is， of course， interesting．But ________ we plan to go swimming， being safe must come first． （ ）
| A． |
though |
B． |
when |
C． |
unless |
In summer vacation， I want to help parents ________ clothes in the square to make some money．
Good idea． It's also a good chance to know about the society．（ ）
| A． |
lend |
B． |
give |
C． |
sell |