Tell your brother to come _____, because it's going to rain in a minute or two.
I remember her face but I cannot _____ where I met her.
He has left his book here on _____, so that you can read it.
He has left his book here on _____, so that you can read it. 汇
The magician picked several persons from the audience and asked them to help him with the performance.
The open university was started in order to help those who _____ having a university education when they were young.