Keeping a diary is ____ good habit. Stick to it, and you will make ____good progress in writing.
| A．a; / | B．a: a | C．the; a | D．/; a |
When the spaceship leaves the earth at very high speed, the astronauts feel __________ they are being crushed against the spaceship floor.
| A．as if | B．even though | C．even if | D．what if |
He set off __________ the direction of the river.
| A．for | B．to | C．on | D．in |
People try to avoid public transportation delays by using their own cars, but this __________ creates further problems.
| A．in short | B．in case | C．in doubt | D．in turn |
It seemed selfish __________ them anything.
| A．for him not give | B．of him not give |
| C．for him not to give | D．of him not to give |
It's necessary __________ the car when you do not use it.
| A．of you to lock | B．for you locking |
| C．for you to lock | D．for you to be locked |