Freezing winter is harmful ________ orange trees.
Though they met for the first time,they talked ________they had been good friends.
The incident ________ a chain of events which resulted in the outbreak of World War I.
That weekend ________up for all the disappointments I'd had.
We found a little boy ________on the ground with both hands ________up with a rope.
“We can't go out in the weather,” Tom said,________ out of the window.