The professor has received the letter ____ to give a lecture in ftinceton Institute.
| A．being invited | B．to be invited | C．inviting him | D．invited |
E-mail , as well as cellphones, _____an important part in daily communication.
| A．have played | B．play | C．are playing | D．is playing |
This kind of storiesinstructive while stories of that kindharmful to children.
| A．is; seems | B．are; seem | C．is; seem | D．are; seems |
We have reached a stage _________we have almost no rights at all.
| A．where | B．why | C．which | D．that |
The little boy_____be very naughty, but he is very lovely.
| A．must | B．should | C．can | D．shall |
he referred to in his article was unknown to the general reader.
A. That B. What C
. Whether D. Where