--- I let my secretary call you several times. Do you know that?
---- I _______ in a meeting. I’m sorry.
| A．had been | B．was | C．am | D．have been |
These shoes look very good. I wonder __________.
| A．how much cost they are | B．how much do they cost | C．how much they cost | D．how much are they cost |
He spoke proudly of his part in the game, without mentioning ________ his teammates had done.
| A．what | B．which | C．why | D．while |
One advantage of playing the guitar is _________ it can give you a great deal of pleasure.
| A．how | B．why | C．that | D．when |
--- What did your parents think about your decision?
--- They always let me do _______ I think I should.
| A．when | B．that | C．how | D．what |
See the flags on top of the building? That was we did this morning.
| A．when | B．which | C．where | D．what |