The farmers thought of ways ________ their trees.
| A．of protect | B．protecting | C．to protect | D．to protecting |
One of the most important questions they had to consider wasof public health
| A．what | B．this | C．that | D．which |
The two sisters are twins，so it is difficult for me to ________ them apart.
| A．speak | B．say |
| C．talk | D．tell |
The newlyfounded chess club formally ________ us to attend the opening ceremony.
| A．requested | B．required |
| C．demanded | D．commanded |
When she visited the children’s home，it ________ her that she could adopt a homeless child.
| A．ran into | B．happened to |
| C．occurred to | D．was occurred to |
The orange looks dry，but you may be able to ________ a few drops.
| A．break out | B．give out |
| C．squeeze out | D．put out |