. When the teacher came in, the student pretended ________ his lessons.
| A．to do | B．to have done | C．to be doing | D．to be done |
It was with great excitement one morning in July ________ the young man read a classified advertisement．
| A．when | B．that | C．who | D．which |
It is obvious that this anti-smoking ____ is mainly aimed at young teenagers．
| A．campaign | B．war | C．battle | D．fighting |
He admitted that when ____ comes to repairing a computer, he had little knowledge of it ．
A．he B．that B．this D．it
—Do you think the weather is good enough for the picnic?
—Yes．You couldn't hope for ____ day at this time of the year．
| A．a nice | B．the nice | C．a nicer | D．the nicest |
The students had the lights for almost three hours.
| A．to burn | B．burning | C．burnt | D．to be burning |