---- May I smoke here?
--- If you , choose a seat in the smoking section.
| A．should | B．could | C．must | D．may |
Microblogs experienced rapid growth in 2011 in China, with the number of microblog Operators, users and visitors ________ several times.
| A．to increase | B．increased | C．increasing | D．increase |
What worried the child most was _____________ to visit his mother in the hospital.
| A．to his being allowed | B．his not being allowed |
| C．not his being allowed | D．not his allowed |
Some people try to knock me down, only______ me more determined to do better.
| A．to make | B．makes | C．having made | D．made |
He was annoyed for _________ outside while his wife was shopping with the key.
| A．being kept | B．keeping | C．kept | D．to be kept |
Her many talents were ___________all her friends.
| A．envy among | B．the envy of | C．the envy at | D．envy it |