He walked _________ fast for us _________ catch up with(赶上)。
Because of the cold weather, half of the children________ill for a week.
Whenever I go past the office, I find him________ on the computer.
--I passed the driving test last weekend.--________!
I am not sure if she________me to her party. If she________me, I will be pleased..
--Can I change for a quiet room? This one is too noisy.--Sure, you can. But you need to pay for________20 dollars.