When the teacher came in, the students pretended _______ the text.
| A．to read | B．to be reading |
| C．to have read | D．having read |
I remembered________ the door before I left the office but forgot to turn off the lights.
| A．locking | B．having locked | C．to have locked | D．to lock |
In communication, a smile is usually________ strong sign of a friendly and ________ open attitude.
| A．the; / | B．a; an | C．a; / | D．the; an |
He ________up early and cook breakfast for himself when he lived alone ,
| A．was used to get | B．used to get | C．is used to get | D．has been getting |
After the introduction of the modern equipment, the factory produced _______ cars as the year before.
| A．twice more | B．as twice as many | C．twice as many | D．twice the amount of |
I was crazy because it _____me two hours to get_____ in the restaurant the other day.
| A．took, served | B．cost, serving | C．took , serving | D．spent, served |