They're not playing baseball today __________ the rain.
| A．because |
| B．as |
| C．since |
| D．because of |
—If not controlled, some terrible diseases will spread in the stricken areas after the terrible earthquake.
—So people there are in _____ need of medical teams.
| A．anxious | B．permanent | C．specific | D．desperate |
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 |