Students in English-speaking countries usually address their man teacher ‘sir”, but __________ their woman teacher “madam”.
| A．seldom they address | B．do they seldom address |
| C．seldom do they address | D．they seldom do address |
Polly’s mother was anxious about ______ she could get home safely in ______ foggy a day.
| A．whether; that | B．if; that | C．whether; such | D．if; so |
Polly observed that she ______ by a tall man in a dark coat when she ______ the faces around her on the train.
| A．was watched; stared at | B．was being watched; glanced at |
| C．was being watched; glared at | D．was watched; looked at |
______ is amazing to us is ______some plants can sense the soft touches of the insects on the leaves.
| A．That; that | B．What; what | C．What; that | D．That; what |
______ wants to enter the company must show his ID at the entrance.
| A．Anyone | B．Whoever | C．Who | D．The one |
I’ve heard a whisper ______ David and Alice are going to get married.
| A．what | B．which | C．who | D．that |