___________his homework, the boy went out to play.
| A．Doing | B．Done | C．Having done | D．To do |
Did it __________ to you that he was jealous?
| A．happen | B．occur |
| C．strike | D．take place |
Two middle-aged passengers fell into the sea. __________，neither of them could swim.
| A．happen | B．occur |
| C．Naturally | D．Unfortunately |
Students are always interested in finding out __________ they can go with a new teacher.
| A．how far | B．how soon |
| C．how often | D．how long |
______ by Typhoon Morakot （莫拉克），Taiwan __________ water and electricity shortage.
| A．Having struck; facing | B．Having struck; faced |
| C．Struck; facing | D．Struck; faced |
We had never __________ this kind of holiday before and had no idea what to expect.
| A．went | B．tried out |
| C．experienced | D．heard |