1. I was speaking to Ann on the phone when suddenly we were_______.
(a) hung up (b) hung back (c) cut down (d) cut off 2. She wondered if she could have the opportunity to spend _______here so that she could learn more about the city.
(a) sometimes (b) some time (c) sometime (d) some times
3. Ms. Breen has been living in town for only one year, yet she seems to be _______with everyone who comes to the store.
19.It was a bold idea to build a power station in the deep valley, but it ________as well as we had hoped.
(a) came off (b) went off (c) brought out (d) made out
20. To survive in the intense trade competition between countries, we must ______the qualities and varieties of products we make to the world market demand .
(a)(be)obliged to:对……很感激;不得不,后接名词或后接不定式(作不得不解),不接动名词。例如:i am very much obliged to you for telling me.我非常感谢你告诉我。(后接代名词you)。she was obliged to abandon the idea.她被迫放弃那种想法。(后接不定式)。本句to之后是动名词carrying,故(a)应排除。(b)(be)committed(to):同意承担;答应干某事,后接动名词、不定式、名词均可。例如:he was committed to fulfilling the task within two weeks.后接动名词fulfilling,符合题意,故(b)为正确答案。(c)engaged (in):从事……,后接介词in.而本题的空白处后为to+动名词。(c)明显不符合题意,故(c)也应立即排除。(d)resolved (to):决心,后接不定式,不接动名词,故(d)也应排除。