----I think it’s impossible for us to work out the plan in just two days. It’s too difficult.----You’re right. We can’t be _______ careful and hard while working on it.
This is my little sister. _______ name is Jenny, we all like_______.
–Where _______ the socks? --_______ on the bed.
–Do you know how to _______this word? –Yes, B-A-L-L.
–Hi, Lucy. Nice to meet you. –Hi, Jim. _______.
Do you know__________? –He came here by train.