I never know how colorful my life would be until I ____ my first college teacher last term.

The children were last seen ___ by theriver.

It sounds ________ that a truck hit two cars. — Luckily, _______of three drivers was hurt.

She packed______ her job, and went off to Qingdao for the Navy celebration.

Occasions are quite rare _____I have the time to spend a day with my kids.