A recent study has ________an unexpected conclusion that the African elephant should be divided into two different species.
| A．kept up with | B．made up with |
| C．caught up with | D．come up with |
around
| A．tough | B．count | C．cough | D．routine |
cheese
| A．radios | B．aside | C．adjust | D．diverse |
wander
| A．absorb | B．wallet | C．village | D．salary |
_________ that causes heavy haze sweeping over china remains unknown to many scientists.
| A．what it is | B．what is it |
| C．who is it | D．who it is |
If you put a stone in the way of an ant, it will go around, over, under or on top, without stopping, until it finds a way to get ______ it needs to be.
| A．what | B．how | C．which | D．Where |