People who can’t ___________ between colors are said to be colorblind .
| A．separate | B．differ | C．distinguish | D．divide |
We should try all means to ensure ourselves_____ all possible risks.
| A．that | B．against | C．for | D．to |
Can you tell me_____ difficult the exam turns out to be?
| A．what | B．how | C．that | D．\ |
Indonesia_____ some 3,000 islands stretching more than 2,000 miles from east to west.
| A．makes up | B．makes the most of | C．is made up of | D．is consisted of |
It was not____ she took off her dark glasses____ I realized she was Julia Roberts.
| A．when; that | B．until; that | C．until; when | D．when; then |
You should try to get a good night’s sleep_____ much work you have to do.
| A．however | B．no matter | C．although | D．whatever |