nager of the sales department is keptbusy all day After he has solved one problem, another is sure to _______

Evidence has been found through years of study_____children’s early sleeping problem is likely to continue when they grow up.

Don’t just believe the advertisement. Thatkind of camera is __________ it says.

Though she has been in England for half a year, she is still unable to _____ in simple English.[ ]

．＿＿＿＿＿a wonderful sense of humour．