--Where was____you picked up the wallet? --Just near the school gate. A. it B. it that C. the place D. the place that 2. I must find out why____so many students made the same mistake. A. is it that B. was it which C. it is what D. it was that 3. How many years is it ___ your sister came to work here? A. after B. since C. before D. until 4. Is it in the factory__you visited last week__this kind of car is made? A./that B. where when C. where that D./when 5. It was because of bad weather______the football match had to be put off. A. so B. so that C. why D. that 6.It was his remarks_____left me wondering about his real purpose. A. which B. what C. where D. that 7. --- Was it in 1969________ the American astronaut succeeded________ landing on the moon? --- Quite right. A. when; on B. that; on C. when; in D. that; in 8.It was not until 1920____regular radio broadcasts began. A. while B. which C. that D. since 9.___is a fact that English is being accepted as an international language. A. There B. This C. That D. It 10.___was in 1979__I graduated from the university. A. That; that B. It; that C .That; when D. It; when