The threats to the health of astronauts in space are very different from ______ on earth.
| A．ones | B．that | C．it | D．those |
It is said that the student seriously ill for two months last semester.
| A．was | B．is | C．had been | D．has been |
From where I stand， the key to the test is to practise English every day.
| A．passing； speaking | B．passing； to speak |
| C．pass； speaking | D．pass； to speak |
The small victories in the fight against poverty and hunger have helped many people who are in trouble allowing them to maintain dignity.
| A．before | B．after | C．for | D．while |
—I wonder if I could use your phone?
— ________.
| A．Go ahead | B．Never mind | C．That’s right | D．Take it easy |
Do you have any idea ________ is actually going on in the classroom?
| A．that | B．what | C．as | D．which |