Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute. 

Although our former neighbor       here for years, we seldom met with each other．

—How long have you been in this office?—Just a few minutes.My cousins ________ here together with me.

Diets are most effective when _____ with exercise.

 If traffic moves at low speeds, the number of accidents is       .