You had better ____________ because you have to drive back home.
| A．not drinking | B．not drink | C．don’t drink | D．not to drink |
On April 12, 1961，_____27—year—old Yuri Gagarin(尤里.加加林)became the first human to go into_____ space.
| A．the;不填 | B．the; the | C．a;不填 | D．a; the |
As young adults, it is our_____ to try our best to deal with each challenge in our education with the help of our teacher.
| A．work | B．job | C．duty | D．task |
Please tell me________. I have some gifts for him.
| A．how has Robert come | B．where Robert is |
| C．when will Robert leave | D．what does Robert like |
—Please _______to return my book by Friday. I'll use it on Saturday.
—No, problem. I'll finish reading it on Thursday.
| A．don't forget | B．not to forget | C．not forget | D．forget not to |
—Hi, guys. Where are you heading now?
—Home. We _________all our money, so we have to walk home now.
| A．spend | B．spent | C．have spent | D．are spending |