5. --- Why didn’t Tom give you one of his paintings? --- I didn’t want one, but he would have given me one if I______.
I looked for my pen for a long time last night,but it ______ in my pocket this morning. How strange!
Life is___,but there is no limit_____.
They stopped fighting but stood there, ____each other without saying anything.
The boy fell asleep where he ______,without undressing.
Some countries are increasing their use of natural gas, and other forms of ______.