Ihavetwogoodpenfriends.OneisanAmerican,______isinEngland.
There aren ’t _____ apples in the basket, but there are some on the table
()It'snineo'clock.Imust______.
Thisbookisthelightestand______(thin)ofallthebooks.
shoes(单数)__________
How many _____(hour) are there in a day?