【题目】Staying with a host family ______ give you the opportunity to experience local culture.

【题目】My parents often buy me something nice, but nothing for ________.（他们）

【题目】We have a PE lesson on ________ afternoon.（星期三）

【题目】—Did Marie Curie discover radium?

【题目】—Why is Lucy so excited these days?

【题目】—You look so sad today.

【题目】Will you live in a large city, ______ would you rather live in a small town?

【题目】There was ______ behind the counter when I went into the hotel, and I had to wait to be served.

【题目】They don’t allow people ______ in front of the building.

【题目】The traffic is ______ during the week than at weekends because everyone is going to work.