The boy is not particular about food and always eats _____ his parents give him

Time is money. —But I think time is money.When money is spent, we can make more; but when time is gone, it never returns.

. He removed the tree ____________ it wasthe best in the ground.

Leaves are found on all kinds of trees, but they differ greatly____ size and shape.

Could you meet me at the airport— I’d like to，but I’m afraid I ______ a very important meeting when you return.