Occasions are quite rare ____ I have the time to spend a day with my kids.
| A．who | B．which | C．why | D．when |
—Honey ,this is a present for your birthday.
— Ah ! A pair of shoes ,Nike! I think they __comfortably.
| A．wear | B．are worn |
| C．are wearing | D．have worn |
David is ___ animal fur ,so he won’t visit anyone who has cats or dogs in the house .
| A．curious about | B．allergic to |
| C．satisfied with | D．fond of |
while intelligent people can often ____ the complex ,a fool is more likely to complicate the simple .
| A．sacrifice | B．substitute |
| C．simplify | D．survive |
They _____ on the program for almost one week before I joined them and now we ____ on it as no good results have come out so far.
| A．had been working ;are still working |
| B．had worked ;were still working |
| C．have been working ;have worked |
| D．have worked ;are still working |
____ how others react to the book you have just read creates an added pleasure.
| A．Hearing | B．Hear |
| C．Having heard | D．To be hearing |