You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.A. in case C. unless C. though D. as
The player kept on running ___ it was raining heavily.
---Hello.May I speak to Lucy? ---_____! Please…I’m afraid she is ____.
The light is out in her room. She ___ to bed.
---Excuse me, is this seat taken?---____.Please have a seat.
It was in the street __ this little girl saw a great scientist named Einstein for the first time in her life