More and more highrise buildings have been built in big cities________space.[ ]

Jack, could you help me whenthe plane will take off on the Internet? —I’m sorry, my computer doesn’t work.

_______ after the race that he didn’t know what to say before so many reporters.

Every Monday morning, students in our school wouldstand at attention, watching the national flag .

The wallet must ________ LiLei’s. Look! It has his IDcard in it.