(经典回放)My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture．

couldn’t have attended

needn’t have attended

mustn’t have attended

shouldn’t have attended

Mr．Bush is on time for everything．How ________ it be that he was late for the opening ceremony?

can

should

may

must

________ by Yang Liwei’s speech, the students are determined to study even harder．

Deeply moved

Having deeply moved

To be deeply moved

Moving deeply

Even if ________, I won’t go．

invited

inviting

I invited

he invites

(经典回放)Friendship is like money：easier made than ________．

kept

to be kept

keeping

being kept

The pilot asked all the passengers on board to remain ________ as the plane was making a landing．

seat

seating

seated

to be seating

It shames me to say it, but I told a lie when ________ at the meeting by my boss．

questioning

having questioned

questioned

to be questioned

When first ________ to the market, these products enjoyed great success．

introducing

introduced

introduce

being introduced

He must be angry, for we heard the glass ________ on the floor．

being broken

break

broken

to be broken

Linda worked for the Minnesota Manufacturing and Mining Company, ________ as 3M．

knowing

known

being known

to be known