Playing on a frozen sports field sounds like a lot of fun. Isn’t it risky, ______?

The attempt and insistence on purchasing the Diaoyu Islands by Japan will ______ harm    China-Japan ties．

I lost my wallet last week, but ____ it didn’t contain much money at that time.

—When did you first meet Tom?—The first day I came to this city，________，on May 2.

--- You should have gone to see the film. It’s very moving. ---______, we arrived too late to catch the last bus.