We choose this hotel because the price for a night here is down to $20, half of_________it used to charge.
that
which
what
how
Tom’s English is not good, so he devoted all his free time to __________ it.
To his surprise, Jack found his son _______as Santa Claus on Christmas Eve.
______ his expression, he didn’t _____the driving test.
The man kept silent in the room unless_______.
Let those in need ________ that we will go all out to help them.