在下列成语中，选出与例句中加点词语的意思相同的一项：
天下之民皆引领而望之
A．引而不发
B．穿针引线
C．引吭高歌
D．抛砖引玉
C
伸长）
图的四幅图中，能正确表示近视眼成像情况和矫正做法的是
A．①③
B．①④
C．②③
D．②④
翻译句子，体会sharp在句中的意义.
1. It was very sharp of you to see that.
2. Emma has a sharp tongue.
3. The photograph is not very sharp.
4. Accidents often happen where there are sharp bends.
5. Please be here at seven o'clock sharp.
6. Sharks have sharp teeth.
