The flu is believed________by virus that likes to reproduce in the cells inside the human nose and throat.
A.causing | B.being caused | C.to be caused | D.to have caused |
On the flight to Chongqing, the memory of my childhood, _______ I was my father’s shadow, came flooding back.
A.as | B.when | C.while | D.where |
.—Alice, you look puzzled.Haven’t you understood it?
—Yes.I _of another problem just now.
A.had thought | B.have thought | C.thought | D.was thinking |
.—I can’t imagine Phelps was caught smoking on campus!
—_______.
A.Nor am I | B.So do I | C.Me, too | D.Me, neither |
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible.
A.otherwise | B.yet | C.already | D.forever |
—What has made him upset recently?
—_______ alone to face a troublesome milk case.
A.Left | B.Being left | C.Having left | D.To leave |