________ nearly all behavior is learned behavior is a basic assumption ________ has been put forward by social scientists.
| A．What; that | B．That; what |
| C．What; what | D．That; that |
_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.
| A．Whatever; that | B．However; as |
| C．Whatever; which | D．However; that |
He bought a house,___________ the price is reasonable.
| A．whose | B．its | C．of which | D．of whom |
In the reading room, we found her ________ at a desk, with her attention ________ on a book.
| A．seating; fixing | B．seated; fixed | C．sitting; fixing | D．to sit; fixed |
All those second-hand cars are sold atbefore
| A．40％as lower price as | B．40％as low a price as |
| C．as 40％low price as | D．40％lower price than |
What _______ pity that you must leave now! It is such _______ great fun to have dinner with you
| A．a; a | B．a; the | C．/; a | D．a; / |