1.you can simply press this button and the machine will start.
(What )you have to ( do )is to ( press)this button.Then the machine willstart.(句型转换）
2.in the right amount-----( 适量)(汉英互译）
3.增加体重————（ gain weight ）（汉英互译）反义词lose weight
4.this district has oil( in）plenty.(用介词副词填空）
5.The teacher examine the students ( in)chemistry.（同上）
6.her diet consisted ( of)bread and fruit.(同上）
7.I advise you notto eat so much junk food.
You (are ）（ advised ）（notto ）eat so much junk food.(句型转换）
8.We advised him to start earlier.
We advised that ( he )(start )earlier.
start之前省略should