Lost in the mountains for three days, what the three men were able to do was the help of helicopters.
The universe began with the Big Bang 13.7 billion years ago, with everything___ in space smaller than a grain of sand.
---How did the accident happen? ---The car went out of___ control and rushed into___ truck ahead of it.
. We are looking for an inexpensive hotel .
Look out! Don’t get too close to the house the roof is under repair.
Is some American friends visited last week?