. The magician picked several persons from the audience and asked them to help him with the performance.
| A．by accident | B．on occasion |
| C．at random | D．on an average |
It doesn’t matter to us _______ you do.
| A．what | B．when | C．how | D．why |
Who do you suppose _________ turn to for help?
| A．should we | B．we should | C．do we | D．can we |
I wonder why they’re so late. They ______ here an hour ago.
| A．should be | B．might be |
| C．should have been | D．might have been |
Danby left word with my secretary _______ he would call again in the afternoon.
| A．who | B．that | C．as | D．which |
It’s helpful to put children in a situation ______ they can see themselves differently.
| A．that | B．when | C．which | D．where |