I'll start early, _________ I oversleep.
| A．unless | B．though |
| C．if | D．whether |
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
A. in caseC. unless
C. though D. as
Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.
| A．have walked | B．will be walking |
| C．have been walking | D．walked |
Below ____ an article about advertisements ____ by a student for her English project.
| A．are; writing | B．be; to be written |
| C．being; written | D．is; written |
_____ an ad does not lie, it does not mean it is altogether innocent.
| A．Even if | B．As if |
| C．If | D．Now that |
She set off at 9 a.m. and ____ the airport an hour later.
| A．will reach | B．would reach |
| C．had reached | D．reached |