Think it over, _____ you’ll work out the math problem.
| A．or | B．so | C．for | D．and |
When you feel helpless and _______, just remember you are not _____ in the world because your friends are around you, including me.
| A．alone; alone | B．lonely; lonely | C．alone; lonely | D．lonely; alone |
---Do you think it will be fine tomorrow?
---_____________. It has rained for so many days.
| A．I hope not. | B．I am sure it will | C．I hope so | D．I’m afraid so |
It’s two and a half weeks since the exchange students __________ Wuxi.
| A．arrived | B．reached | C．have been in | D．have arrived in |
Little Tom has got a lot of birthday presents, but he isn’t able to take all of them ___.
| A．on time | B．at a time | C．at same time | D．from time to time |
We can have ___ blue sky if we create ___ less polluted world.
| A．a. a | B．a, the | C．the, a | D．the, the |