Between the two generations, it is often their different views of life and value _____ cause family conflicts.

The country has already sent up 3 unmanned spacecraft, the most recent at the end of last March.

I want to buy that kind of cloth because I _____ the cloth _____ well

Shelly is good at English,so she is never_____speaking to foreigners.

Checking your answers before handing in your paper can help you mistakes.