---It’s a lovely day, isn’t it? ---Yes. I love ___when the weather is warm and sunny in winter. Why not sit outside and have a chat?
Thank you for giving me a hand. I ______ in the experiment without your valuable help.
This cake is very sweet. You _____ a lot of sugar in it.
He paid for a seat, when he ______ have entered free.
Helen ______ go on the trip with us, but she isn’t quite sure yet.
— Tom is never late for work. Why is he absent today ? — Something _______ to him.