Helping others is a habit, you can learn even at an early age.
| A．it | B．that | C．what | D．one |
One of the first foreign expeditions _______ Mount Qomolangma arrived in Tibet in 1921.
| A．climbing | B．climbed | C．had climbed | D．to climb |
________ at the city centre, the old temple has a history of more than 500 years.
| A．Locating | B．Locate | C．Located | D．To locate |
If the weather had been better, we could have gone outing. But it ____ all day.
| A．rains | B．has rained | C．had been rained | D．rained |
________ a difficult situation, so you should send him a message and give him some advice.
| A．As he is in | B．He is in | C．Being in | D．He being in |
They sold ______ boxes of such sweets last week.
| A．four dozens of | B．four dozen | C．four dozen of | D．four dozens |