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 |
In face of ____ failure, it is the most important to keep up ____ good state of mind.
| A．/; a | B．a; / | C．the; / | D．/; the |
Listen to the two girls by the window. What language ____ ?
| A．did they speak | B．were they speaking |
| C．are they speaking | D．have they been speaking |
Hurry up! Alice and Sue are waiting for you at the school gate.
-Oh! I thought they _______ without me.
| A．went | B．are going | C．have gone | D．had gone |
They ______ on the program for almost one week before I joined them, and now we ____ on it as no good results have come out so far.
| A．had been working; are still working | B．had worked; were still working |
| C．have been working; have worked | D．have worked; are still working |
---What’s that terrible noise?
---The neighbors ____for a party.
| A．have prepared | B．are preparing | C．prepare | D．will prepare |