With a lot of difficult problems________, the manager felt worried all the time.
| A．settled | B．to be settled | C．settling | D．to settle |
1. shade A. behave B. shadow C. considerate D. battle
2. crowd A. slow B. window C. allowD. row
3. actor A. worth B. therefore C. export D. doctor
4. reduce A. chemical B. regretC. generationD. intend
5. nutrition A. struggleB. support C. summaryD. confuse
Everyone, please remain ____ until the plane has come to a complete stop.
| A．seat | B．seated | C．seating | D．to seat |
I still remember ____ to the Summer Palace and what I saw there.
| A．taking | B．to take | C．to be taken | D．being taken |
Most birds find it __
__ to sleep in the trees.
| A．was safe | B．safe | C．to be safe | D．being safe |
Edward couldn’t remember when he first met Mr. Crook, but he was sure it was ____ Sunday because everybody was at ____ church.