Today Bob contradicted Ms. Li, our math teacher, in class, _____ made her angry with him.
| A．that | B．which | C．what | D．who |
Foreign trade, the ____ of goods between nations, takes place for many reasons.
| A．exchange | B．bargain | C．production | D．business |
The famous professor’s lectures, though ____ informal, are considered far more informative and interesting.
| A．occasionally | B．constantly | C．regularly | D．usually |
____ through Africa, the infectious disease jumping from children to adults killed 1,000 people.
| A．Swept | B．Having been swept | C．Having swept | D．Sweeping |
Now more people prefer a house in a coast city to ____ in such a large city as Beijing.
| A．that | B．it | C．the one | D．one |
Everything will ____ soon. Just be optimistic and confident.
| A．pick up | B．set up | C．turn up | D．hold up |