II.单项填空(共15小题;每小题1分,满分15分)21.The news came to us as _______ great surprise that he had turned __________ writer. A a; a B a; / C. /; a D. /; /
Had your father seen the doctor earlier, he ____.
He ___ on the grass, looking at the clouds in the sky.
His brother __ a lot of silkworms last summer.
On the wall __ two large portraits.
Sunglasses can ___ us from strong sunlight.