The World Health Organization warned that Asian countries __________ attentive to bird flu since Asia ___________ got rid of the disease completely.
| A．should keep; has | B．must remain; has not | C．ought to stay; has been | D．shall be; has not been |
Jane didn’t get to the airport on time, ______she missed the plane.
| A．but | B．for | C．so | D．Or |
Move the plants to a south-facing window, ________they can absorb daytime heat.
| A．that | B．when | C．which | D．Where |
---Do you know what time you’ll be back this evening, Eric?
----I’m not sure. It depends on_______ the interview lasts.
| A．when | B．what | C．how long | D．how much |
You will be late for school ________you hurry up.
| A．if | B．since | C．when | D．Unless |
A great cheer went up ______the first goal was scored.
| A．before | B．when | C．unless | D．Though |