When I came into the room, my computer was on. It worried me since I switching it on. [NOT/REMEMBER]

I looked around - there nobody in my room and everything was in its usual place. [BE]

Suddenly I - the book had gone! I had left it on the table but it wasn’t there any more. [UNDERSTAND]

I checked the window - it . [CLOSE]

That meant that someone had come into the room through the door. My impulse was to call the police but I called Jim instead. [ONE]

“What ?” Jim sounded sleepy. [HAPPEN]

I explained that someone the book.“Oh, no!” Jim sounded unhappy. “Do you have any idea how valuable it is?”

“There’s another thing I understand,” I interrupted Jim. “My computer’s on but I always switch it off before leaving home.” [NOT/CAN]

“Ok, stay at home. I’ll be at place in half an hour,” he said and the phone went dead. [YOU]