We hung a net round the bed, which could protect us _____ mosquitoes and other insects.
| A．from | B．by | C．off | D．under |
Brian is gifted in writing music; he is very likely to be Beethoven.
| A．a | B．an | C．the | D．不填 |
More expressways in Sichuan soon to promote the local economy.
| A．are being built | B．will be built |
| C．have been built | D．had been built |
The books on the desk, covers are shiny, are prizes for us.
| A．which | B．what | C．whose | D．that |
You _____be careful with the camera. It costs!
| A．must | B．may | C．can | D．will |
That restaurant is extremely popular, ______ you may have to wait to get a seat.
| A．for | B．so |
| C．or | D．yet |