so far, thanks to, look for, in search of, look forward to
（1） I am____ seeing Frank again.
（2）We have done most of the work____ .
（3）____ my math teacher, I passed the math test easily.
（4）They arrived at the island ____ the unknown plant.
（5）A mother crocodile (鳄鱼) was ____ food near the seaside.
X，试根据原子结构理论和元素周期律预测正确的是（ ）
的底面
内取一点
，使
与
、AD所成的角都是
，则线段