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根據中文提示，用詞組的適當形式填空。每空一詞。

1. She ___________ ___________（收到……來信） her pen friend yesterday.

2. All the athletes ___________ ___________（對……滿意） with the nice service during the Beijing Olympics.

3. ___________ ___________（到目前為止），many measures have been taken to control the spread of A/H1N1.

4. After the earthquake, he left for Wenchuan as a volunteer ___________ ___________（而不是） a tourist.

5. You_________ __________（最好） check over your exam paper carefully before you hand it in.