No one is allowed ______ in the classroom.
| A．smoking | B．smoke | C．smoked | D．to smoke |
The rain fell down in time this spring, _______ the better growing of the crops.
| A．thanks to | B．due to | C．contributing to | D．contributed to |
Man differs from beasts ______ the former is able to think, while the latter aren’t.
| A．once | B．as long as | C．in that | D．for |
Tell me, Mr. Mentakis, was Mrs. Smith one of your_______ customers?
| A．regular | B．common | C．average | D．usual |
----Can you persuade him to take me along? ----_______. I’m not sure.
| A．It doesn’t matter | B．It all depends |
| C．It is a piece of cake | D．That looks at things |
He was standing there with his hand ________ his bike.
| A．resting on | B．putting on | C．holding on | D．trying on |