He was observed ________ into the house before the owner came back.
| A．to slip |
| B．slip |
| C．slipping |
| D．slipped |
相关试题
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
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