I know him well_______ we have been friends since we were born.
| A．so | B．but | C．because. | D．And |
____________ they are brothers, they look like each other.
| A．Because | B．Though | C．When | D．So |
We will spend our summer holiday in Guilin, but we haven’t decided______________.
| A．what to buy | B．where to go |
| C．how to go | D．which to choose |
— When _________ you________ your teeth, Billy?
—Just now.
| A．do; brush | B．have; brushed |
| C．did; brush | D．was: brushing |
When I was walking in the street, I saw a plane___________ over my head.
| A．flies | B．flying | C．flew | D．fly |
We ___________ when the teacher came in.
| A．were talking | B．talked |
| C．talk | D．are talking |