I don't know he will come or not this afternoon．（ ）
A．ifB．whenC．whether
To keep safe in coming summer vacation you are supposed to ________.
① refuse to let strangers in
②turn off the gas(煤气）after cooking
③go swimming alone in the river
④take care of your own things when you travel
⑤leak（泄露）your personal information on the Internet
| A． |
②③⑤ |
B． |
①②④ |
C． |
①③⑤ |
The ________ is China’s national treasure. It’s a kind of cute animal that likes eating bamboo.
| A． |
panda |
B． |
tiger |
C． |
elephant |
—Happiness is about having each tiny wish come true.
—________ we work hard, we’ll make our life full of happiness.
| A． |
If |
B． |
Unless |
C． |
Though |
—Could you tell me ________ on weekdays?
—I usually go to school on foot but sometimes by bike.
| A． |
why do you go to school |
B． |
when you went to school |
C． |
how you go to school |
—How exciting the speech is!
—Pretty good! This is the best speech ________ I’ve ever heard.
| A． |
which |
B． |
that |
C． |
who |