Looking at my mother's ___________ face, I regretted not having told her my whereabouts on the phone.
| A．worrying | B．worried | C．anxioused | D．satisfied |
Mike apologized for _______ to inform her of the change in the working plan.
| A．his being not able | B．him not to be able | C．his not being able | D．him to be not able |
It was Tom as well as two of his classmates that _______ invited to the party.
| A．was | B．were | C．has | D．have |
The Chinese exploration ship will join in the search for______ seemed like parts of the missing plane.
| A．what | B．which | C．that | D．it |
— It is hot today, isn’t it? — Yes. _______ yesterday.
| A．So was it | B．So it was | C．So it is | D．So is it |
______ I admit that there are quite a few problems, I don't agree that they cannot be solved.
| A．Supposing | B．Since | C．While | D．As |