完形填空（共20小题;每题1.5分，满分30分）
阅读下面短文，从短文后所给的四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
There was a store a half hour’s walk from my apartment, and it was the cheapest place to buy food for us students studying abroad in France, 41 there was always a long checkout line. On a cold March day, I spent my time shopping, got what I needed and 42 the checkout.
43 , the lines that day were long. There were people everywhere. I was standing 44 . in line because I just wasn’t that 45 my French yet. Any time that I had to 46 with the natives, I got a little nervous.
