Partly ______ about his lost love, he buried himself in office work.
A. forgetting B. to have forgot C. to forget D. having forgot
Learning to care for a pet helps a child grow into an adult who feels responsible for ______
dependent on him.
A. who B. those C. ones D. whoever
The hotel turned us down because we didn’t make reservations（预约）, but we ______ have.
A. might B. can C. must D. should
Personal relationships ______ over years may be lost when we move houses.
A. building up B. built up C. having built up D. to be built up
Someone in the crowd called out his name, but he couldn’t see ______.
A. whose B. who C. where D. which
Sales of their new video has ______ one million dollars this year.
A. got over B. set up C. brought about D. broken through
