100.As the busiest woman in Norton,she made_________her duty to look after all the other people’s affairs in that town.
| A．this | B．that | C．one | D．it |
The old couple have married for 40 years and never once _______ with each other.
| A．they had quarreled |
| B．they have quarreled |
| C．have they quarreled |
| D．had they quarreled |
I just wonder _______ that makes him so excited.
| A．why it does | B．what he does |
| C．how it is | D．what it is |
It was with great joy _______ he received the news _______ his lost son would soon return home.
| A．because; that | B．that; that |
| C．because; which | D．that; / |
_______ is no trouble that the Dallas Mavericks will defeat the Washington Wizards in the next game.
| A．It | B．As |
| C．That | D．There |
Evidence came up _______ specific speech sounds are recognized by babies as young as 6 months old.
| A．what | B．which |
| C．whose | D．that |