1. She looks sad. Could you please tell me ____ that prevents her from being as happy as before?

A. what it is     B. it is what       C. how it is        D. it is how

2. —I rang you at about nine, but there was no reply.

       —Oh, that was probably       I was seeing the doctor.

     A£®why                     B£®when                  C£®what                   D£®that

3. —Go and ask her          come .

    —OK.                          

     A£®what time would she like to                   B£®at what time she’d like to

     C£®when would she like to                          D£®when she likes to