That was so serious a matter that I had no choice but ________ the police.
A) called in B) calling in
C) call in D) to call in
You __________ her in her office last Friday; she’s been out of town for two weeks.
A) needn’t have seen B) must have seen
C) might have seen D) can’t have seen
This ticket _________ you to a free meal in our new restaurant.
A) gives B) grants
C) entitles D) credits
The fifth generation computers, with artificial intelligence, _________ and perfected now.
A) developed B) have developed
C) are being developed D) will have been developed