Joseph __________ to evening classes since last month, but he still can't say "What's your name?" in Russian.
Swimmers must be very strong in order to build up speed because of the high resistance (阻力)of the water. Runners,__________, must struggle against the heavy resistance of the air and ground.
They're not playing baseball today __________ the rain.
In some places women are expected to earn money __________ men work at home and raise their children.
Joe, don't __________ now ; you're improving all the time. It won't be long __________ you can speak English well.
It was a nice meal,__________ a little expensive.