--I would why he ____so strangely these days. --Recent pressure at study may account for his behavior.
65. The boy was lucky enough ________.
63. --I’m sorry I’m late. I got held up in the traffic on my way here. --______.
62. Only one of these books is ________.
61. I am not appealing for myself. I am appealing ________ the millions and millions of fresh college graduates.
60. Once you get _______ something, it is very hard to ________.