The hospital has been set up in ______was a wasteland many years ago.
| A．which | B．that | C．where | D．what |
Neither Jack and Tom ___ Mary ___ at home that day.
| A．nor, are | B．nor, is | C．or;were | D．nor; was |
The River Nile ___ flood large areas, but now the water of it ___ produce electricity.
| A．was used to ; is used to | B．used to; used to | C．used to; is used to | D．was used; is using |
We learned a lot from her father, an engineer ___ does research ___ science.
| A．that; into | B．whom; on | C．who; into | D．which ; on |
You should make a careful plan ___ the experiment.
| A．before to do | B．before doing | C．after to do | D．after doing |
Here’s my card, let’s keep in ___.
| A．touch | B．relation | C．connection | D．friendship |