单选题 Over half the population of this country participate ____ sport.

单选题 It is ____ that bus drivers deeply care about the safety of their passenger.

单选题 I felt ____ about not visiting my parents more often.

单选题 Jack is very modest, so he always ____ down just how successful he's been.

单选题 We've____ the business by opening two more stores.

单选题 Daming Lake and Baotu Spring ____ a great number of tourists from all over the world every year.

单选题 The whole ____ of building the house is expected to take 10 months.

单选题 ____ took Ellie hours to calm down after the argument.

单选题 Mrs. Anderson has a good memory and can ____ the details of what happened 15years ago.