When she ____________ the car door, she realized she had left the key in her bedroom.
| A．opened | B．was to open | C．will open | D．had opened |
One can always manage to do more things，no matter________full one’s schedule is in life.
| A．how | B．what |
| C．when | D．where |
________I have to give a speech，I get extremely nervous before I start.
| A．Whatever | B．Whenever |
| C．Whoever | D．However |
Mark needs to learn Chinese ________ his company is opening a branch in Beijing.
| A．unless | B．until |
| C．although | D．since |
________we have enough evidence，we can’t win the case.
| A．Once | B．As long as |
| C．Unless | D．Since |
________ small，the company has about 1,000 buyers in over 30 countries.
| A．As | B．If |
| C．Although | D．Once |