They took rock samples back to Earth for _____study.

—Are you going on a trip to Huai’an these days?—I haven’t made a _____ yet. It’s really hard for my family to reach an agreement.

  — _______will your mother come back?  — In two days.

 They can’t go out to work        the heavy rain.

 My father doesn’t like milk. My mother doesn’t like milk, _______.