—Is this the magazine ______ she often writes articles?
—Yes, it is.
| A．to which | B．of which | C．for which | D．about which |
.Not one in one hundred children exposed to the disease ______ likely to develop it.
| A．should be | B．must be | C．is | D．are |
Robert is said ______ abroad，but l don't know what country he studied in．
| A．to have studied | B．to study | C． to be studying | D．to have been studying |
The purpose of new technologies is to make life easier，______it more difficult．
| A．not make | B．not to make | C． not making | D．don't make |
I've worked with children before，so I know what ______ in my new job.
| A．expected | B．to expect | C．to be expecting | D．expects |
Having a trip abroad is certainly good for the old couple，but
______whether they will enjoy it.
| A．to see | B．to be seen | C．seeing | D．see |