If you keep on, you’ll succeed ＿＿＿＿＿＿＿＿.
| A．in time | B．at one time | C．at the same time | D．on time |
In the global economy，a new drug for cancer，________ it is discovered，will create many economic possibilities around the world.
| A．whatever | B．whoever |
| C．wherever | D．whichever |
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 |