As the plane flew off towards the mountains in the distance the sound of its engines gradually________ .

单项选择题The farm produced more food than_________ thought possible during World War II.

单项选择题The building looks deserted but there‘s _______to be someone on guard there.

单项选择题She has to work hard to keep the house_____ and tidy with three small children.

单项选择题The old lady______ leaving the store without paying for the goods.

单项选择题How many Vietnamese joined the parades in Hanoi and Ho Chi Minh City

单项选择题Mary sent me a gift and wished me many happy________ on my birthday.

单项选择题What reports have the U.N. Children’s Fund received

单项选择题What caused the one-month delay of the Southeast Asian Nations summit

单项选择题What’s the purpose of the campaign British scientists are launching

单项选择题In what direction is the wave of freezing cold air moving now