Visitors are not permitted ________ the park after dark, because of the lack of lighting.
| A．to enter | B．entering |
| C．to enter in | D．entering in |
The secretary worked late into the night, ________ a long speech for the president.
| A．to prepare | B．preparing |
| C．prepared | D．was preparing |
________ the difficult maths problem, I have consulted Professor Russell several times.
| A．Working out | B．Worked out | C．To work out | D．Work out |
It’s quite hot today. Do you feel like _________ for a swim?
| A．to go | B．going | C．lgo | D．having gone |
Group activities will be organized after class _______ children develop team spirit.
| A．helping | B．having helped | C．helped | D．to help |
The producer comes regularly to collect the cameras _______ to our shop for quality problems.
| A．returning | B．returned | C．to return | D．to be returned |
Annie Salmon, disabled, is attended throughout her school days by a nurse _______ to guard her.
| A．to appoint | B．appointing | C．appointed | D．having appointed |
Clearly and thoughtfully________, the book inspires confidence in students who wish to seek their own answers.
| A．writing | B．to write | C．written | D．being written |
Anxiously, she took the dress out of the package and tried it on, only _________ id didn’t fit
| A．to find | B．found | C．finding | D．having found |
As they were walking around, they noticed a man _______ against a tree.
| A．sit | B．to sit | C．sitting | D．sat |